Theodor married Apollonia List on 21 Feb 1871 in Jo Daviess County, Illinois, USA. Apollonia (daughter of Adam List and Apollonia Schantz) was born on 18 Jun 1851 in Bas-Rhin, Alsace, France; died on 24 Jul 1915 in Oregon, USA. [Group Sheet] [Family Chart]

1. Mary Katherine Gehlen
2. Magdalena Susan Gehlen
3. Nicholas John Gehlen
4. George Gehlen
5. Charles Gehlen
6. John Adam Gehlen
7. Frank Gehlen
8. Joseph Gehlen
9. Apollonia Marie Gehlen
10. Benedict Gehlen
11. Theodore Gehlen